In a certain species of plant, flowers occur in three colors: blue, pink, and white. A pure-breeding pink plant is mated with a pure-breeding white plant. All of the F 1 are blue. When the blue F 1 plants are selfed, the F 2 plants occur in the ratio 9 blue : 3 pink : 4 white.

-What is the name for this type of interaction?
A) recessive epistasis
B) dominant epistasis
C) duplicate recessive epistasis
D) duplicate dominant epistasis
E) dominant and recessive epistasis

Question

In a certain species of plant, flowers occur in three colors: blue, pink, and white. A pure-breeding pink plant is mated with a pure-breeding white plant. All of the F₁ are blue. When the blue F₁ plants are selfed, the F₂ plants occur in the ratio 9 blue : 3 pink : 4 white.

-What is the name for this type of interaction?

-What is the name for this type of interaction?
A) recessive epistasis
B) dominant epistasis
C) duplicate recessive epistasis
D) duplicate dominant epistasis
E) dominant and recessive epistasis

Quizplus · Accepted Answer

Recessive epistasis occurs when the presence of two recessive alleles at one locus masks the expression of alleles at a second locus, resulting in a modified 9:3:4 phenotypic ratio in the offspring.

In a Certain Species of Plant, Flowers Occur in Three